Can You please advise how we can discard oil that has been heated?

[Smt. Priyanka asked: Swami, can You please advise how we can discard oil that has been heated?

I heard that we end up consuming trans-fats, which are harmful to the heart if the oil that was used for deep frying is re-heated. Sometimes, a lot of oil is to be used to deep fry food items. Once the cooking is done, what can be done with the leftover oil? Someone once suggested that I can filter the used oil to separate it from food particles, and donate it to bicycle shops or mechanic shops because they need to use grease for some repairs. Is this considered as wastage of food? I do not have this facility of giving to mechanic shops or anywhere else. Swami, how can I deal with this situation? At Your divine Lotus feet, Priyanka]

Swami replied:- You have to find such shops and give it after storing such used oil for a long time.